Improvement in stop-motions for looms



TEMPLETON Stop- Motiqn for Looms.

S. G R EEN W U 0 D & .l.

Patented April27,1875.

WED/away.

THE GRAPHIC C0.PNOTO -L|TH.39&41 PARK PLACLNAY.

UNITED STATES PATENT OEEIoE.

SAMUEL GREENWOOD AND JAMES TEMPLETON, OF LOWELL, MASS.

IMPROVEMENT IN STOP-MOTIONS FOR LOCMS.

Specification forming part of Letters Patent No. 162.471, dated April27, 1875; application filed June 24, 1874.

To all whom it may concern Be it known that we, SAMUEL GREENWOOD andJAMES TEMPLETON, both of Lowell, in the county of Middlesex andCommonwealth of Massachusetts, have invented certain Improvements inStop-Motions for Looms, of which the following is a specification:

Our invention consists, mainly, of a reciprocating notched plate, incombination with a weighted and hooked lever having a movable fulcrum,together with certain well known parts, as hereinafter described.

The accompanying drawing represents our invention attached to the rightend of a loom, at the front of the same.

A is part of the breast-beam of a loom. B is part of the frame of theloom supporting the breast-beam. G is the shed of warp-threads. D is thenewly-woven cloth. E is one of the temples, in its usual position at theselvage of the cloth,and just in front of the making end of the cloth. Fis the rocking shaft, actuated by the curved rod G, which is raised bythe cam H on the lower roller I, and falls by its own weight, or isthrown down by said cam H acting on an arm, K. Q is a narrow thin plate,(straight, except at its extreme left end, where it is arched up,)touching the cloth all the way across in front of the temples E, atright angles to the selvage. The plate Q slides on its edge in thinslots at the ends of two brackets, one on each side of the cloth. One ofthe brackets is shown at R. Both brackets are alike, and are screwed tothe top of the breast-beam. The plate Q is notched on its under edge,between the brackets R, but not in such a way as to form teeth like asaw, as the notches, taken at the edge of the plate, are about asixteenth of anineh apart, and both sides of the notch are out upward tothe right, so that, in case of any inequality in the surface of thecloth, the teeth can catch only when the plate Q is sliding to the left.The pl ateQ projects about six inches to the right of the right-handbracket R, and has on its under edge, at about half an inch from itsend, a broad wire staple, S. Through this staple projects the back endof the stiff horizontal rod T, the other end of said rod T being securedto the top of the vertical crank U. The rod T has a straight horizontalspring, V, secured to its left side, near its front end, at such anangle that the said rod and spring touch the opposite arms of the stapleS when the spring is not bent. The crank U is supported by thebreast-beam. One end of the lever W embraces the lower end of the crankU, and the other end of said lever is bent around the rod G, said leverturning upon the vertical rod X, fixed in the breast-beam.

It is evident that when the cam H lifts the rod G the spring-rod V Tturns on the crank U to the left, and pushes the plate Q to the left.Upon the top of the breast-beam, at the right of the bracket It, issecured a trough, Y, which stands at right angles to said beam. WVithinthis trough slides backward and forward a frame. Z, which is also intheshape of a trough. At the front end of said frame Z, upon a rod whichruns across said frame Z, is hung the lever 1, near the back end of saidlever. This lever l is so much heavier at its back end that this endfalls when unsupported, thereby raising the forward end of said leverenough to allow the rod 2 on the rocking shaft F to swing under itwithout touching it.

It will be seen that when the back end of the spring-rod V T is turnedto the left, the spring V presses against the left arm of the staple S,throwing the plate Q to the left and allowing the back end ofthe lever lto fall, thereby raising the hook upon the forward end of said leverenough to clear the upper end of the rod 2, which is also movingforward. Now, if one of the warp-threads is broken and tangled in such away as to form a bunch in the cloth, or if there is any other mismakingin the cloth which would necessitate picking out, the teeth of the plateQ will catch in said bunch or other defect, and the spring V will bebent against the rod T without moving the plate Q to the left, thuspreventing the hooked forward end of the lever 1 from rising. Thishooked end ofsa-id lever 1, being caught by the upper end of said rod 2,will be drawn forward, and with it the frame Z, striking the left end ofthe lever M, and pushing it forward, thereby releasing the shipper-lever0 and stopping the loom.

A small bracket may be cast on the temple and slotted for the p ate Q toslide in, when the temples must be kept very near to the making end ofthe cloth, as in the manufacture of silks,

the surface of the fabric, as and for the purpose set forth.

2. The combination of the lever W, the crank U, spring-rod V T, theplate Q, the le ver 1, the lever M, and the shipper O, as and for thepurpose herein described.

SAMUEL GREENWOOD. JAMES TEMPLETON.

Witnesses:

ALBERT M. MOORE, CHARLES R. BLAISDELL.

